I got another question; did you ever make a headcanon post for Megas's last stand? Like, are the resistance fighters actually working on a way to free him? Are there any procedures in place for a potential full corruption of Megas? Etc.
Not yet, since there’s a ton of characters I haven’t covered in posts thus far besides some general info on the villains and occasionally when I tie a few people to other things, but I have a few thoughts:
First is that the Megas gang probably all fought like crazy when Fuse first invaded, but were caught off-guard and fairly isolated from other Fusion Fighters at the time, as Earth’s forces hadn’t completely assembled and Fuse was smart enough to target Megas straight from the beginning. Being originally made from Glorft technology–a species he’d already lost to–he wasn’t going to take any chances. He probably had smaller monsters of pure fusion matter slip into Megas’ systems and began infecting it from the inside, not only attacking and damaging its systems, but also forcing Coop and the others to abandon Megas in order to save themselves from the rapidly spreading infection. Now, it’s heavily guarded by fusion monsters and the terrafusers attached to its form only continue to maintain and grow the infection.
Megas being a machine, it’s probably harder/impossible for Fuse to make a Fusion of it like he can with organic beings. (There’s Fusion Computress, but since she’s paired with Fusion Dexter, it could be argued that he constructed her similarly to how the real Dex constructed the real Computress.) However, he plans on turning Megas into the next best thing, a colossal fusion monster reset to its original purpose to wipeout mankind, only this time under his command. The Gloft tech seems to be combating this infection a little through some auxiliary system, but Megas is still barely hanging on and thus remains inactive/unmovable–all the power it has left devoted to keeping off the pressing infection.
Kiva is probably out leading some battlefront, but Coop’s been entrusted with restoring Megas. It’s why he stays at the junkyard. He continues to remain outwardly chill and lazy–much to a lot of other Fusion Fighters’ chagrin–but a big part of it is because, without Megas, he feels he can’t do anything to help Earth. He’s always been a lazy, video game loving foodie, then he suddenly had an important role as a protector of Earth which, although he didn’t always take it seriously, did matter to him. Now, with that swiftly yanked away from him and leaving him back where he was, he kinda just… feels useless, even if he doesn’t want to confront it. All he can do is fight to keep his usual, laid-back attitude, blow off his concerns, and work to get Megas back. He might not go in to the infected zone much himself, but he does lead strategies for Fusion Fighters that do.